Tiko, originally called Keka by the Bakweris, is a town and important port in the southwest region of Cameroon. The settlement grew as a market town for Douala fishermen, Bakweri (Kpwe people) farmers
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf47329255a2e50f1fd1e9f352972c1e5d9ae9b3b8ab56a6bd8e883a26b9868a9. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ef619787-d75d-4ca6-9991-cc6b3d7d7ba9.json and https://artists.proofprofile.net/proofs/artist/ef619787-d75d-4ca6-9991-cc6b3d7d7ba9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa53ab242972e5ad8dd0ec4066410bcb00eee7dff36386812e57eda1a5553216d. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QT4K52579615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5111f9b5a071bb60e4e63de3f620f660a029ebe596510096bcb2579c1bd1042a. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QT4K52579620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce8d2cd6ac83747d4b77bd375c2b98a8dbc7c0044be74a5ae02d85d7b2b7af7f. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTVM2254741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc50795c1536b5a9147ad808cc1eb7a8142a7649711256c28743b4053db8ccc0d. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNJY2259651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92ec6e943ab7d060e2fd1a12c7c660428f9bf66ee965e6e3c425beddf9c7cf97. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNJZ2294870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd84282f101448adc5b4a7b6b197e1b2bf91027f619616b1484c6ce8c517a2e71. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTVM2294147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c3238924bb329c1cc1615195d24474e8d8b0f8c0bace74250ac0143ee98dd10. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTVM2294148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3a717e766925005b6f6f97101b1f159306dea136f6511d18746202cce1a7369. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTVM2294149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f28c5357ad3b1f2ca0595b7bbfe790d3720b5665c46e7aedb0f156a265499c5. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTVM2294150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36f1a2b43c053452993e64818f15fd64ea987eb0ae86422729d939c001214d78. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTVM2294151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5db42567f22016c9bacb24030ea60a5ffa7d41a33cb488bfe96eb6c59458f0c8. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTVM2294152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e53fd86f796604169c57992a2fa454fe59c110f8f75f3dbbbfe388d7086574b. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTVM2294153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa38c2ba4424783d64a16ef32ea55fbfd130153ed3ad4675b3787e3cfa4b9f0df. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTPX2133899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x902986551e1b6663338a37454136ab0062878ca311a01b36370a27fff5613972. Chain 2 (Bitcoin): anchored in block 957680 (2026-07-12T09:07:22Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNJX2365893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80a8b64a85f9363887eb20aef30156d3119e22eff21dd86f86f1e765fa415a07. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNJZ2356390.